264 lines
9.7 KiB
Groff
264 lines
9.7 KiB
Groff
.\" shorthand for double quote that works everywhere.
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.ds q \N'34'
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.TH SAVAGE __drivermansuffix__ __vendorversion__
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.SH NAME
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savage \- S3 Savage video driver
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.SH SYNOPSIS
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.nf
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.B "Section \*qDevice\*q"
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.BI " Identifier \*q" devname \*q
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.B " Driver \*qsavage\*q"
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\ \ ...
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.B EndSection
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.fi
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.SH DESCRIPTION
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.B savage
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is an __xservername__ driver for the S3 Savage family video accelerator chips. 2D, 3D, and Xv acceleration
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is supported on all chips except the Savage2000 (2D only). Dualhead operation is supported on MX, IX, and
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SuperSavage chips. The
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.B savage
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driver supports PCI and AGP boards with the following chips:
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.TP 16
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.BI Savage3D
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(8a20 and 8a21) (2D, 3D)
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.TP 16
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.B Savage4
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(8a22) (2D, 3D)
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.TP 16
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.B Savage2000
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(9102) (2D only)
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.TP 16
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.B Savage/MX
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(8c10 and 8c11) (2D, 3D, Dualhead)
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.TP 16
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.B Savage/IX
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(8c12 and 8c13) (2D, 3D, Dualhead)
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.TP 16
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.B SuperSavage/MX
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(8c22, 8c24, and 8c26) (2D, 3D, Dualhead)
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.TP 16
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.B SuperSavage/IX
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(8c2a, 8c2b, 8c2c, 8c2d, 8c2e, and 8c2f) (2D, 3D, Dualhead)
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.TP 16
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.B ProSavage PM133
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(8a25) (2D, 3D)
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.TP 16
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.B ProSavage KM133
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(8a26) (2D, 3D)
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.TP 16
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.B Twister (ProSavage PN133)
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(8d01) (2D, 3D)
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.TP 16
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.B TwisterK (ProSavage KN133)
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(8d02) (2D, 3D)
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.TP 16
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.B ProSavage DDR
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(8d03) (2D, 3D)
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.TP 16
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.B ProSavage DDR-K
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(8d04) (2D, 3D)
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.SH CONFIGURATION DETAILS
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Please refer to __xconfigfile__(__filemansuffix__) for general configuration
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details. This section only covers configuration details specific to this
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driver.
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.PP
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The following driver
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.B Options
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are supported:
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.TP
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.BI "Option \*qHWCursor\*q \*q" boolean \*q
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.TP
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.BI "Option \*qSWCursor\*q \*q" boolean \*q
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These two options interact to specify hardware or software cursor. If the
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SWCursor option is specified, any HWCursor setting is ignored. Thus, either
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\*qHWCursor off\*q or \*qSWCursor on\*q will force the use of the software
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cursor. On Savage/MX and Savage/IX chips which are connected to LCDs, a
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software cursor will be forced, because the Savage hardware cursor does not
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correctly track the automatic panel expansion feature.
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Default: hardware cursor.
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.TP
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.BI "Option \*qNoAccel\*q \*q" boolean \*q
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Disable or enable acceleration. Default: acceleration is enabled.
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.TP
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.BI "Option \*qAccelMethod\*q \*q" "string" \*q
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Chooses between available acceleration architectures. Valid options are
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.B XAA
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and
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.B EXA.
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XAA is the traditional acceleration architecture and support for it is very
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stable. EXA is a newer acceleration architecture with better performance for
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the Render and Composite extensions, but the rendering code for it is newer and
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possibly unstable. The default is
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.B XAA.
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.TP
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.BI "Option \*qRotate\*q \*qCW\*q"
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.TP
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.BI "Option \*qRotate\*q \*qCCW\*q"
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Rotate the desktop 90 degrees clockwise or counterclockwise.
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This option forces the ShadowFB option on, and disables acceleration and
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the RandR extension.
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Default: no rotation.
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.TP
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.BI "Option \*qShadowFB\*q \*q" boolean \*q
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Enable or disable use of the shadow framebuffer layer.
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.\" See
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.\" .BR shadowfb (__drivermansuffix__)
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.\" for further information.
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This option disables acceleration.
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Default: off.
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.TP
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.BI "Option \*qLCDClock\*q \*q" frequency \*q
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Override the maximum dot clock. Some LCD panels produce incorrect results if
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they are driven at too fast of a frequency. If UseBIOS is on, the BIOS will
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usually restrict the clock to the correct range. If not, it might be
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necessary to override it here. The
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.B frequency
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parameter may be specified as an integer in Hz (135750000), or with
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standard suffixes like "k", "kHz", "M", or "MHz" (as in 135.75MHz).
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.TP
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.BI "Option \*qCrtOnly\*q \*q" boolean \*q
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This option disables output to the LCD and enables output to the CRT port only.
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It is useful on laptops if you only want to use the CRT port or to force the CRT
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output only on desktop cards that use mobile chips. Default: auto-detect active
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outputs
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.TP
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.BI "Option \*qUseBIOS\*q \*q" boolean \*q
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Enable or disable use of the video BIOS to change modes. Ordinarily, the
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.B savage
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driver tries to use the video BIOS to do mode switches. This generally
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produces the best results with the mobile chips (/MX and /IX), since the BIOS
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knows how to handle the critical but unusual timing requirements of the
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various LCD panels supported by the chip. To do this, the driver searches
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through the BIOS mode list, looking for the mode which most closely matches
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the __xconfigfile__ mode line. Some purists find this scheme objectionable. If
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you would rather have the
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.B savage
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driver use your mode line timing exactly, turn off the UseBios option.
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.B Note:
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Use of the BIOS is required for dualhead operation.
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Default: on (use the BIOS).
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.TP
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.BI "Option \*qIgnoreEDID\*q \*q" boolean \*q
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Do not use EDID data for mode validation, but DDC is still used
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for monitor detection. This is different from NoDDC option.
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.br
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The default value is
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.B off.
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.TP
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.BI "Option \*qShadowStatus\*q \*q" boolean \*q
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Enables the use of a shadow status register. There is a chip bug in the
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Savage graphics engine that can cause a bus lock when reading the engine
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status register under heavy load, such as when scrolling text or dragging
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windows. The bug affects about 4% of all Savage users without DRI and
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a large fraction of users with DRI. If your system
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hangs regularly while scrolling text or dragging windows, try turning this
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option on. This uses an alternate method of reading the engine status
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which is slightly more expensive, but avoids the problem. When DRI is
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enabled then the default is \*qon\*q (use shadow status), otherwise
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the default is \*qoff\*q (use normal status register).
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.TP
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.BI "Option \*qDisableCOB\*q \*q" boolean \*q
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Disables the COB (Command Overflow Buffer) on savage4 and newer chips.
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There is supposedly a HW cache coherency problem on certain savage4 and
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newer chips that renders the COB useless. If you are having problems with
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2D acceleration you can disable the COB, however you will lose some
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performance. 3D acceleration requires the COB to work. This option only
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applies to Savage4 and newer chips. Default: \*qoff\*q (use COB).
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.TP
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.BI "Option \*qBCIforXv\*q \*q" boolean \*q
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Use the BCI to copy and reformat Xv pixel data. Using the BCI for Xv causes
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graphics artifacts on some chips. This option only applies to Savage4 and
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prosavage/twister chips. On some combinations of chipsets and video players,
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BCI formatting might actually be slower than software formatting (\*qAGPforXv\*q
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might help in this case). BCI formatting can only be used on video data with
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a width that is a multiple of 16 pixels (which is the vast majority of videos).
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Other widths are handled through software formatting. Default: on for prosavage
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and twister (use BCI for Xv); off for savage4 (do not use the BCI for Xv).
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.TP
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.BI "Option \*qAGPforXv\*q \*q" boolean \*q
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Instructs the BCI Xv pixel formatter to use AGP memory as a scratch buffer.
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Ordinarily the BCI formatter uses a an area in framebuffer memory to hold
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YV12 planar data to be converted for display. This requires a somewhat expensive
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upload of YV12 data to framebuffer memory. The \*qAGPforXv\*q option causes the BCI
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formatter to place the YV12 data in AGP memory instead, which can be uploaded
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faster than the framebuffer. Use of this option cuts upload overhead by 25%
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according to benchmarks. This option also smooths out most of the shearing
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present when using BCI for pixel conversion. Currently this option is
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.B experimental
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and is disabled by default. Video width restrictions that apply to \*qBCIforXv\*q
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also apply here. Only valid when \*qDRI\*q and \*qBCIforXv\*q are both active,
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and only on AGP chipsets. Default: \*qoff\*q.
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.br
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If \*qAccelMethod\*q is set to \*qEXA\*q and \*qAGPforXv\*q is enabled, then the
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driver will also attempt to reuse the AGP scratch buffer for UploadToScreen
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acceleration.
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.TP
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.BI "Option \*qAGPMode\*q \*q" integer \*q
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Set AGP data transfer rate.
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(used only when DRI is enabled)
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.br
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1 \-\- x1 (default)
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.br
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2 \-\- x2
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.br
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4 \-\- x4
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.br
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others \-\- invalid
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.TP
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.BI "Option \*qAGPSize\*q \*q" integer \*q
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The amount of AGP memory that will allocated for DMA and textures in
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MB. Valid sizes are 4, 8, 16, 32, 64, 128 and 256. The default is
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16MB.
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.TP
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.BI "Option \*qDmaMode\*q \*q" string \*q
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This option influences in which way DMA (direct memory access) is used
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by the kernel and 3D drivers.
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.br
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Any \-\- Try command DMA first, then vertex DMA (default)
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.br
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Command \-\- Only use command DMA or don't use DMA at all
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.br
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Vertex \-\- Only use vertex DMA or don't use DMA at all
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.br
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None \-\- Disable DMA
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.br
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Command and vertex DMA cannot be enabled at the same time. Which DMA
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mode is actually used in the end also depends on the DRM version (only
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>= 2.4.0 supports command DMA) and the hardware (Savage3D/MX/IX
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doesn't support command DMA).
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.TP
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.BI "Option \*qDmaType\*q \*q" string \*q
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The type of memory that will be used by the 3D driver for DMA (direct
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memory access).
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.br
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PCI \-\- PCI memory (default on PCI cards)
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.br
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AGP \-\- AGP memory (default on AGP cards)
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.br
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\*qAGP\*q only works if you have an AGP card.
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.TP
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.BI "Option \*qBusType\*q \*q" string \*q
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The bus type that will be used to access the graphics card.
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.br
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PCI \-\- PCI bus (default on PCI cards)
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.br
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AGP \-\- AGP bus (default on AGP cards)
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.br
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\*qAGP\*q only works if you have an AGP card. If you choose \*qPCI\*q
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on an AGP card the AGP bus speed is not set and no AGP aperture is
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allocated. This implies
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.BI DmaType
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\*qPCI\*q.
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.TP
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.BI "Option \*qDRI\*q \*q" boolean \*q
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Enable DRI support. This option allows you to enable or disable the DRI.
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Default: \*qon\*q (enable DRI).
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.SH FILES
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savage_drv.o
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.SH "SEE ALSO"
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__xservername__(__appmansuffix__), __xconfigfile__(__filemansuffix__), Xserver(__appmansuffix__), X(__miscmansuffix__)
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.SH AUTHORS
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Authors include Tim Roberts (timr@probo.com) and Ani Joshi (ajoshi@unixbox.com)
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for this version, and Tim Roberts and S. Marineau for the original driver from
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which this was derived.
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